Split asm and c flags and srcs in bp2build output
This allows removal of almost all current items from the mixed build
denylist, which were previously broken due to being unable to separately
control flags for compilations of different languages within the same
target.
Note that this does not appropriately implement asm/c srcs and flags for
either the shared variant or the static variant. This will require a
followup.
Test: bp2build.sh and mixed_libc.sh CI scripts
Test: Updated b2build tests
Change-Id: I28cf7437ee96cdf2fdbcb1eda2303691cff08ba4
diff --git a/cc/bp2build.go b/cc/bp2build.go
index 0c827c5..e417c69 100644
--- a/cc/bp2build.go
+++ b/cc/bp2build.go
@@ -183,15 +183,26 @@
// Convenience struct to hold all attributes parsed from compiler properties.
type compilerAttributes struct {
- copts bazel.StringListAttribute
+ // Options for all languages
+ copts bazel.StringListAttribute
+ // Assembly options and sources
+ asFlags bazel.StringListAttribute
+ asSrcs bazel.LabelListAttribute
+ // C options and sources
+ conlyFlags bazel.StringListAttribute
+ cSrcs bazel.LabelListAttribute
+ // C++ options and sources
+ cppFlags bazel.StringListAttribute
srcs bazel.LabelListAttribute
- includes bazel.StringListAttribute
}
// bp2BuildParseCompilerProps returns copts, srcs and hdrs and other attributes.
func bp2BuildParseCompilerProps(ctx android.TopDownMutatorContext, module *Module) compilerAttributes {
var srcs bazel.LabelListAttribute
var copts bazel.StringListAttribute
+ var asFlags bazel.StringListAttribute
+ var conlyFlags bazel.StringListAttribute
+ var cppFlags bazel.StringListAttribute
// Creates the -I flags for a directory, while making the directory relative
// to the exec root for Bazel to work.
@@ -215,15 +226,21 @@
return append(includeDirs, baseCompilerProps.Local_include_dirs...)
}
- // Parse the list of copts.
- parseCopts := func(baseCompilerProps *BaseCompilerProperties) []string {
- var copts []string
- for _, flag := range append(baseCompilerProps.Cflags, baseCompilerProps.Cppflags...) {
+ parseCommandLineFlags := func(soongFlags []string) []string {
+ var result []string
+ for _, flag := range soongFlags {
// Soong's cflags can contain spaces, like `-include header.h`. For
// Bazel's copts, split them up to be compatible with the
// no_copts_tokenization feature.
- copts = append(copts, strings.Split(flag, " ")...)
+ result = append(result, strings.Split(flag, " ")...)
}
+ return result
+ }
+
+ // Parse the list of copts.
+ parseCopts := func(baseCompilerProps *BaseCompilerProperties) []string {
+ var copts []string
+ copts = append(copts, parseCommandLineFlags(baseCompilerProps.Cflags)...)
for _, dir := range parseLocalIncludeDirs(baseCompilerProps) {
copts = append(copts, includeFlags(dir)...)
}
@@ -260,6 +277,9 @@
if baseCompilerProps, ok := props.(*BaseCompilerProperties); ok {
srcs.Value = parseSrcs(baseCompilerProps)
copts.Value = parseCopts(baseCompilerProps)
+ asFlags.Value = parseCommandLineFlags(baseCompilerProps.Asflags)
+ conlyFlags.Value = parseCommandLineFlags(baseCompilerProps.Conlyflags)
+ cppFlags.Value = parseCommandLineFlags(baseCompilerProps.Cppflags)
// Used for arch-specific srcs later.
baseSrcs = baseCompilerProps.Srcs
@@ -290,6 +310,9 @@
}
copts.SetValueForArch(arch.Name, parseCopts(baseCompilerProps))
+ asFlags.SetValueForArch(arch.Name, parseCommandLineFlags(baseCompilerProps.Asflags))
+ conlyFlags.SetValueForArch(arch.Name, parseCommandLineFlags(baseCompilerProps.Conlyflags))
+ cppFlags.SetValueForArch(arch.Name, parseCommandLineFlags(baseCompilerProps.Cppflags))
}
}
@@ -315,6 +338,9 @@
// TODO(b/186153868): add support for os-specific srcs and exclude_srcs
srcs.SetValueForOS(os.Name, bazel.SubtractBazelLabelList(srcsList, baseSrcsLabelList))
copts.SetValueForOS(os.Name, parseCopts(baseCompilerProps))
+ asFlags.SetValueForOS(os.Name, parseCommandLineFlags(baseCompilerProps.Asflags))
+ conlyFlags.SetValueForOS(os.Name, parseCommandLineFlags(baseCompilerProps.Conlyflags))
+ cppFlags.SetValueForOS(os.Name, parseCommandLineFlags(baseCompilerProps.Cppflags))
}
}
@@ -333,9 +359,28 @@
}
}
+ // Branch srcs into three language-specific groups.
+ // C++ is the "catch-all" group, and comprises generated sources because we don't
+ // know the language of these sources until the genrule is executed.
+ // TODO(b/): Handle language detection of sources in a Bazel rule.
+ isCSrc := func(s string) bool {
+ return strings.HasSuffix(s, ".c")
+ }
+ isAsmSrc := func(s string) bool {
+ return strings.HasSuffix(s, ".S") || strings.HasSuffix(s, ".s")
+ }
+ cSrcs := bazel.FilterLabelListAttribute(srcs, isCSrc)
+ asSrcs := bazel.FilterLabelListAttribute(srcs, isAsmSrc)
+ srcs = bazel.SubtractBazelLabelListAttribute(srcs, cSrcs)
+ srcs = bazel.SubtractBazelLabelListAttribute(srcs, asSrcs)
return compilerAttributes{
- srcs: srcs,
- copts: copts,
+ copts: copts,
+ srcs: srcs,
+ asFlags: asFlags,
+ asSrcs: asSrcs,
+ cSrcs: cSrcs,
+ conlyFlags: conlyFlags,
+ cppFlags: cppFlags,
}
}